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Abstract

To investigate the effects of the dry-wet cycles, degree of compaction, saturation, and confining pressure on the strength of silty clay, this paper conducted UU tests to determine the stress-strain curves of prepared samples under the influence of several factors. The cohesion c and internal friction angle φ of the prepared samples were measured, with the deterioration rules explored. The experimental results show that with the increasing times of dry-wet cycles, the stress-strain curve of the soil changes from the strain hardening mode to the strain softening mode, and the softening rate increases after two dry-wet cycles. Meanwhile, the cohesion and internal friction angle of soil increase with the rising degree of compaction, with the former showing a greater improvement and the latter showing a limited increase. The cohesion of soil decreases with the increasing saturation, and the internal friction angle of soil presents a trend of first increasing and then decreasing with the rising saturation. Additionally, the cohesion and internal friction angle of soil deteriorate to varying degrees with the increasing dry-wet cycles, with more deterioration of the former than that of the latter. The factors that have a strong influence on cohesion are in the order of times of dry-wet cycles>saturation>degree of compaction. The only factor that has a strong effect on the internal friction angle is the times of dry-wet cycles, while the influence of other factors is not huge.

Publication Date

8-18-2022

DOI

10.14048/j.issn.1671-2579.2022.04.033

First Page

180

Last Page

184

Submission Date

May 2025

Reference

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